International Concrete Abstracts Portal

Title: Preferable Use of Hybrid Cement in Concrete Intended for Industrial Applications

Author(s): I. Janotka, P. Martauz and Michal Bačuvčík

Publication: Special Publication

Volume: 320

Issue:

Appears on pages(s): 2.1-2.14

Keywords: alkali-silica reaction, concrete, hybrid cement; strength, shrinkage

Date: 8/1/2017

Abstract:
Important properties of the novel hybrid cement, H-Cement, are due to the use of fly ash, metallurgical slag, alkaline waste water from red mud deposits and ordinary portland clinker. H-Cement saves around 80 % of CO2 emissions compared to ordinary portland cement (OPC) production and enables effective recovery and safe disposal of industrial wastes. H-Cement is suitable for the preparation of ready-mixed concretes of strength classes between C8/10 (1160/1450 psi) and C30/37 (4350/5370 psi) and as a shrinkage reducing and alkali-silica reaction (ASR)-mitigation agent. This cement provides a slight expansion-reducing effect in permanent water curing at 20 °C (68 °F) and an evident shrinkage-reducing effect in permanent dry curing at 20 °C (68 °F) / 60 % R. H. and 40 °C (104 °F) / 15 % R. H. -air relative to OPC. The ASR is suppressed at 20 °C (68 °F) and 40 °C (104 °F) / 100 % R. H. -air cure.